DISCLAIMERS
None of these mods, datapacks, texturepacks, shaders, or anything else is of my authorship. The only thing I did was assembling everything together. All credit goes to the makers of these amazing creations, which have my utmost respect and gratitude.

There are 3 datapacks made by ChoiceTheorem that ensure compatibility between his Overhauled Villages mod and Farmer's Delight, Savage & Ravage, and Waystones. The modpack still works fine without them, but they add some very welcome variations and conveniences to villages and pillager outposts from that mod. I could not include them in the file along with the other datapacks, but you can acquire them here , here , and here , in order of mention. Make sure to move them to the folder global_pakcs/required_data

Make sure to join the modpack's Discord!

WHAT IS THIS MODPACK ABOUT?
(Head to the TLDR session for a more compact list of features)

Medievalistic is a modpack all about granting the player a medieval experience as accurate as possible without sacrificing the convenience of gameplay and core aspects of Minecraft. So, while forging your tools and stealing from villagers is much harder, you won't have to deal with inconveniences such as temperature and thirst. You will also notice that the world in now very alive, with vegetation spreading, stone structures getting mossy and cracked overtime, iron bars and doors oxidizing, seasons changing and affecting these process, among other features that make up for a more immersive experience. Multiple quality of life features are also included.

The way I aimed at achieving this is by completely overhauling the villager and illager factions by adding new structures and a mobs, so now the world is filled with bustling towns, imposing fortresses and new warriors craving for the destruction of their enemies. Some of the fortresses are vacant and can be occupied by you, others must be taken by force, which might require the assistance of hired soldiers that you will lead into battle, either on horseback with your lance couched, knocking your enemies aside in a powerful charge, or standing your ground on foot with your men, sword and shield in hand. Get used to that, as now squads of pillagers might pay your village a visit at night, announced by only a goat horn when they arrive. Raids are also much more difficult, so be prepared for hordes that can eliminate whole cities in minutes if you are not careful. Maybe you can take care of them with the new siege machinery.

Other aspects of medieval life were also replicated: you can now dedicate your time to winemaking, baking, cooking, farming, forging, campaigning, building, and more. This also means that now you can't just take what you want from villages, since if you are caught red-handed, the villagers will notice and you will quickly lose reputation. Do it multiple times, and the Golem will come catch you. Should you not care for that though, you can strip villagers of the goods not only in their chests, but also in their very own pockets.

Although magic is not that medieval, I couldn't remove it without taking away a good chunk of the game with it, so instead, I committed a little more to that bit. Vanilla enchantments now all have descriptions narrating their supernatural abilities and fundamentals and how they were developed, and the player can acquire magical illager artifacts to use as weapons.

However, if you want to do something greater with your life, you can leave the life of combatant behind and go explore this completely new overworld, with new structures, cultures, ruins, mystery, dungeons and more. To make the exploration easier, you can make yourself a ship, or steal one of the multiple vessels you will find sailing the Seven Seas. The Nether is also revamped and filled with as many new surprises, and, if you make the most of your exploration, you will have gathered the resources and artifacts necessary to go to the End and earn yourself the title of Dragonslayer.

Each and every mod was selected with care and consideration for the whole pack, to ensure that the desired experience is achieved while maintaining a certain balance. I hope you enjoy playing this pack as much as I did.

TLDR (Too long; didn't read)

(with mod names for consulting)

Breathing world: vegetation grows and spreads and some materials can decay. (Serene Seasons, Regrowth, Immersive Weathering, Naturalist).
Revamped world: the overworld now has multiple new biomes and structures, with the Vanilla ones being totally remade and the new ones adding even more history and mystery to the places you visit, ranging from gigantic temples, to amazing cities, to decaying ruins. Same goes for the Nether. (Terralith, YUNG's mods, ChoiceTheorem's Overhauled Villages, Luki's Grand Capitals, Towns & Towers, Enhanced Dungeons, Castle Dungeons, Awesome Dungeon Ocean Edition, Illager Warship, It Takes a Pillage, Small Horse Stable, The Lost Castle, Valhelsia Structures, Hunter's Return, Incendium).
Revamped warfare: villagers now have guards and soldiers that you can lead, illagers can attack at night, raids are stronger with new types of illagers and multiple armored foes. Plenty of new fortified locations added for both parties and villages are much bigger. (It Takes a Pillage, Savage & Ravage, Illagers Wear Armor, Villager Recruits, Guard Villagers, Armor of the Ages, aforementioned structure mods).
Illager activity: ransack villages, pickpocket villagers, can ride ravagers that are domesticated while young, lose reputation in a village if caught stealing. (You Thief!, Steal the Villagers).
New combat: new animations for combat, better tridents, added lance, revamped horseback combat, shields can parry projectiles and don't have delay, can wear leather, gold, iron and diamond armor over chainmail for better protection. (Better Combat, Better Tridents, Jousting, Horse Combat Controls, Responsive Shields, Shield Parry, Chainmailed).
Medieval roleplay at its finest: multiple crafting systems were reworked to receive a healhty dose of realism and make them more dynamic and add value to their produce (forging, baking, cooking, farming, butchering, etc), while others are brand new (winemaking, painting, composing music, etc). (No Tree Punching, Salty's Realistic Forging, Bakery, Farmer's Delight, Butcher's Delight, Vinery, Joy of Painting, Music Maker).
More magic: enchantments have lore behind them and villager and illager magical artifacts can be acquired and used by the player. (Enchantment Lore, Savage & Ravage, Village Artifacts).
New End experience: the journey to your final destination has been made much longer and harder, with at least 12 different types of eyes being required to open the portal, scattered across the world. (End Remastered, The Lost Castle).
Quality of life: multiple mods were added to make the experience more convenient and enhance performance. (Too many to list).

HOW DO I PLAY THIS MODPACK?
(might contain spoilers)

It is not recommended to go around picking every single item you see. In fact, do that and you will end up with a full inventory and a very angry golem right off the bat. Instead, respect the property of villagers (or make sure you are not caught stealing) and leave the looting to the abandoned castles and pillager structures, and know when to take something and when to leave it behind. For example, you will come across plenty of pieces of armor, tools and weapons, but if you take all of them, you will have hardly any space for anything else. Same goes for food, materials, blocks, etc. The problem, however, is greatly mitigated by the use of Bags of Holding, Astikor's Carts, and Ender Chested horses, but moderation is still advised.

Speaking of armor and gear, you will notice that making your own is not only much more expensive, but also extremely laborious and time consuming, as it was back in the day (but this time around, it can be quite therapeutic). So give those emeralds the value they deserve, because unless you intend on spending hours in mines, caves and forges, trade will be the best way to acquire gear for you and your soldiers, of which you can have dozens at a time. If you wish to manufacture your own goods, check the small guides added to the tooltips of the items of Salty's Realistic Forging. Also don't try punching trees, as it won't work here. Instead grab yourself some flint and sticks from leaves, and start from there (JEI will help you a ton here).

Moving on to structures, I added so many castles and other structures for a reason: occupy and restore them, to revert their ruinous state and take them back to their glory days, making them livable bases for you and any villagers or other mobs you take with you. Of course, you can still build anything you like, with even some changes to make it a little less difficult, such as World Edit and Forgematica. After all, the villages still need walls to defend against raids, and not all have good buildings already made for you to move and settle in.

With that in mind, you are ready to enjoy the pack to its fullest, playing as whatever you like: you can be a knight errant, travelling the world collecting better gear for you and your steed and delivering villages from pillager oppression, conquering the bastions of undeads and illagers. You can settle in a castle and be the baron of a region, caring for the villagers and doing battle against passing caravans of soldiers. You can become a robber and take for you anything you want without care for good or evil. You can live amongst the pillagers and help them in their raids to win that loot for yourself. You can be an explorer dedicated to finding this world's beauties, or even just be a simple peasant caring for your crops, your animals, or your forge, making the most of the (not always) peaceful life in a village in the countryside.